Tumbleweeds get around

Could a tumbleweed by any other name be an icon of the American West?Probably not. Especially since the other name is Russian thistle.Either way, we’re stuck with the ubiquitous born-toroll plants — green and growing or dead and blowing between fences.Native to Eurasia, Russian thistles reportedly arrived in North America in the 1870s, possibly as stowa...

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